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Guru3D.com » News » New Windows 11 Patch Worsens Ryzen L3 Cache Latency, AMD Announces Fix Dates

New Windows 11 Patch Worsens Ryzen L3 Cache Latency, AMD Announces Fix Dates

by Hilbert Hagedoorn on: 10/13/2021 09:06 AM | source: reddit | 53 comment(s)
New Windows 11 Patch Worsens Ryzen L3 Cache Latency, AMD Announces  Fix Dates

Microsoft released the first Cumulative Updates for Windows 11 on October 12th. AMD and Microsoft discovered shortly after the release of Windows 11 that the OS is not optimized for AMD Ryzen CPUs, resulting in higher L3 cache latency and a broken UEFI-CPPC2 (preferred cores mechanism).

Testing revelas a close to 20 ns L3 cache delay for some Ryzen processors. The October 12 "patch Tuesday" update increased that value even worse reaching 30 ns.

AMD made a remark on social media that was shared on Reddit. The company stated that fixes for the two bugs are being developed and will be available soon. On October 21, the UEFI-CPPC2 bug patch will be released. AMD's "customers" include huge organizations who use Threadripper or EPYC workstations to conduct mission-critical workloads. On October 19, Windows Update will fix the L3 cache delay bug.



New Windows 11 Patch Worsens Ryzen L3 Cache Latency, AMD Announces  Fix Dates




« ATP TLC SSDs Match MLC Endurance with 66% Higher Endurance · New Windows 11 Patch Worsens Ryzen L3 Cache Latency, AMD Announces Fix Dates · GeIL Announces Availability of POLARIS RGB DDR5 Gaming Memory Kits up to 32 GB and DDR5-5600 »

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user1
Senior Member



Posts: 1974
Joined: 2016-01-29

#5956337 Posted on: 10/17/2021 09:29 PM
They do provide an ISO and a place to report bugs. Problem is, the bug reports lack the kind of detail they used to contain. Problem is, MS has always taken bug reports as a joke. WinXP, upon release, was in just as bad a shape as Beta 1 was....yet, we went through 2 beta releases and 2 release candidates... There were thousands of bug reports filed for both betas but MS didn't seem interested in addressing any of them. Compared to WinXP at launch, W11 is perfect....



fair enough, though I would still argue that considering the ecosystem they have now, the fact that such a major bug can make its way into retail on a platform they claim to "support", is pretty inexcusable, its not like its some esoteric hardware configuration that's effected, its nearly half of all the new pcs that they intend to ship to/with.

back in the xp days they had alot more weird (and buggy) hardware configurations to deal with, and much less information about them ,less staff, so It was more forgivable imo.

sykozis
Senior Member



Posts: 22075
Joined: 2008-07-14

#5956364 Posted on: 10/18/2021 01:09 AM
back in the xp days they had alot more weird (and buggy) hardware configurations to deal with, and much less information about them ,less staff, so It was more forgivable imo.

They also had thousands of beta testers filing dozens of extremely well detailed bug reports near hourly on some days....and yet, the retail release was in just as bad a shape as Beta 1 was.... Even Beta 2, RC1 and RC2 were far more stable than what was actually released. RC1 and RC2 were "feature complete"....so there's zero excuse for the retail release being less stable. It felt like MS took all of our hard work and said "screw it, we're shipping Beta 1 as retail".....

itpro
Senior Member



Posts: 1360
Joined: 2020-02-20

#5957398 Posted on: 10/21/2021 01:44 PM
You try telling me because I won't take part for Microsoft BS passport for new equipment, I am not enthusiast. Show me your insider skills. PS. I won't even need to post my XBOX profile, it is even more huge than this one. Until I buy a new rig with Windows 11 next year, I won't upgrade any system in workspace, ministry or university, before 2025. Only new rigs. Keep your enthusiasm for your wallets guys and gals. I am a CS guy.

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